arch/powerpc/kernel/iomap.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * ppc64 "iomap" interface implementation.
   4  *
   5  * (C) Copyright 2004 Linus Torvalds
   6  */
   7 #include <linux/pci.h>
   8 #include <linux/mm.h>
   9 #include <linux/export.h>
  10 #include <asm/io.h>
  11 #include <asm/pci-bridge.h>
  12 #include <asm/isa-bridge.h>
  13
  14 /*
  15  * Here comes the ppc64 implementation of the IOMAP
  16  * interfaces.
  17  */
  18 unsigned int ioread8(void __iomem *addr)
  19 {
  20         return readb(addr);
  21 }
  22 unsigned int ioread16(void __iomem *addr)
  23 {
  24         return readw(addr);
  25 }
  26 unsigned int ioread16be(void __iomem *addr)
  27 {
  28         return readw_be(addr);
  29 }
  30 unsigned int ioread32(void __iomem *addr)
  31 {
  32         return readl(addr);
  33 }
  34 unsigned int ioread32be(void __iomem *addr)
  35 {
  36         return readl_be(addr);
  37 }
  38 EXPORT_SYMBOL(ioread8);
  39 EXPORT_SYMBOL(ioread16);
  40 EXPORT_SYMBOL(ioread16be);
  41 EXPORT_SYMBOL(ioread32);
  42 EXPORT_SYMBOL(ioread32be);
  43 #ifdef __powerpc64__
  44 u64 ioread64(void __iomem *addr)
  45 {
  46         return readq(addr);
  47 }
  48 u64 ioread64be(void __iomem *addr)
  49 {
  50         return readq_be(addr);
  51 }
  52 EXPORT_SYMBOL(ioread64);
  53 EXPORT_SYMBOL(ioread64be);
  54 #endif /* __powerpc64__ */
  55
  56 void iowrite8(u8 val, void __iomem *addr)
  57 {
  58         writeb(val, addr);
  59 }
  60 void iowrite16(u16 val, void __iomem *addr)
  61 {
  62         writew(val, addr);
  63 }
  64 void iowrite16be(u16 val, void __iomem *addr)
  65 {
  66         writew_be(val, addr);
  67 }
  68 void iowrite32(u32 val, void __iomem *addr)
  69 {
  70         writel(val, addr);
  71 }
  72 void iowrite32be(u32 val, void __iomem *addr)
  73 {
  74         writel_be(val, addr);
  75 }
  76 EXPORT_SYMBOL(iowrite8);
  77 EXPORT_SYMBOL(iowrite16);
  78 EXPORT_SYMBOL(iowrite16be);
  79 EXPORT_SYMBOL(iowrite32);
  80 EXPORT_SYMBOL(iowrite32be);
  81 #ifdef __powerpc64__
  82 void iowrite64(u64 val, void __iomem *addr)
  83 {
  84         writeq(val, addr);
  85 }
  86 void iowrite64be(u64 val, void __iomem *addr)
  87 {
  88         writeq_be(val, addr);
  89 }
  90 EXPORT_SYMBOL(iowrite64);
  91 EXPORT_SYMBOL(iowrite64be);
  92 #endif /* __powerpc64__ */
  93
  94 /*
  95  * These are the "repeat read/write" functions. Note the
  96  * non-CPU byte order. We do things in "IO byteorder"
  97  * here.
  98  *
  99  * FIXME! We could make these do EEH handling if we really
 100  * wanted. Not clear if we do.
 101  */
 102 void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
 103 {
 104         readsb(addr, dst, count);
 105 }
 106 void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
 107 {
 108         readsw(addr, dst, count);
 109 }
 110 void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
 111 {
 112         readsl(addr, dst, count);
 113 }
 114 EXPORT_SYMBOL(ioread8_rep);
 115 EXPORT_SYMBOL(ioread16_rep);
 116 EXPORT_SYMBOL(ioread32_rep);
 117
 118 void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
 119 {
 120         writesb(addr, src, count);
 121 }
 122 void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
 123 {
 124         writesw(addr, src, count);
 125 }
 126 void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 127 {
 128         writesl(addr, src, count);
 129 }
 130 EXPORT_SYMBOL(iowrite8_rep);
 131 EXPORT_SYMBOL(iowrite16_rep);
 132 EXPORT_SYMBOL(iowrite32_rep);
 133
 134 void __iomem *ioport_map(unsigned long port, unsigned int len)
 135 {
 136         return (void __iomem *) (port + _IO_BASE);
 137 }
 138
 139 void ioport_unmap(void __iomem *addr)
 140 {
 141         /* Nothing to do */
 142 }
 143 EXPORT_SYMBOL(ioport_map);
 144 EXPORT_SYMBOL(ioport_unmap);
 145
 146 #ifdef CONFIG_PCI
 147 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
 148 {
 149         if (isa_vaddr_is_ioport(addr))
 150                 return;
 151         if (pcibios_vaddr_is_ioport(addr))
 152                 return;
 153         iounmap(addr);
 154 }
 155
 156 EXPORT_SYMBOL(pci_iounmap);
 157 #endif /* CONFIG_PCI */